ok so I talked about my stepbrother on here before (last year) and how I saved his job and got him away from drinking and smoking and drugs only for him to be a fucking unthankful dick to me and ditch me as a friend after some stupid fight. His girlfriend is friends with me now and she's telling me how he is smoking too much at the bar they go to and how he lies about only smoking there and not after work. He also refuses to stop even though she's been begging him to because: He'd look stupid in front of his buddies if he didn't smoke with them. Also they all tease her from time to time to a point where she had to run out crying and he didn't follow her until she called him and told him to come outside to talk. He then forced her to go back because "It'd look bad if he just left his buddies". He also for some reason tries to be friends with me (I get it, I'm awesome). But I'm definitely not forgiving him because he ruined my 16th birthday by bullying me so hard I cried. For some reason he still uses "the way I treated him" as an evasion for not going to couples therapy with her. To be clear: I was 14 when I "forced" him to stop with his shit. I was having problems with severe depression and he was lying about not doing certain things (even though I never FORCED him to not do them I just begged him to stop and he just said he would stop). It got to a point where I was so bad I was cutting myself and planning out my own suicide and he was still piling his problems on top of it and the weight was crushing me so hard I constantly flipped out and got angry at him. He knew all about how I was cutting and depressed he just didn't give a shit. The fact that he's making me look like the bad guy but at the same time tries to use me to gain friends because I actually have a normal social life makes me furious and I just want to bash his ugly face in.The fact that he's making the poor girl suffer the same way it happened to me really hits me hard. Should I intervene or just tell her what I've been telling her up until now?: "Sit him down, tell him what you don't like and that it HAS to change and why it has to change and tell him (like you told me) that it can't go on that way."